The company is called The Leatherman (http://www.accu-riser.com/) He makes them (cost about $35) in both black and simulated walnut, as well as a really well thought out riser for a M4 (.223 collapsible stock). But the one for the M4 is designed specifically for the original Colt stock and works on many, but not mine. The Walnut stock worked extremely well on my Marauder. It comes with two different replaceable height combs and screws (if you want to mount it permanently) and leave off the Velcro strap that comes with it as well as some double sided sticky tape to hold it in place. All in all I am very happy. When I called him about the .223 riser not working he apologized and said to ship it back for a refund. I sent it back, but with an order for another of the walnut risers for my .22 I scoped and needed to raise the cheek piece.